Report

FZJ-2016-04512

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Über die Freisetzung von Spaltprodukten aus kugelförmigen Brennelementen (speziell über das System: Cäsium-Matrixgraphit in strömendem Helium)

Leyers, H. J. (Corresponding author)FZJ*

1981
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/12249

Report No.: Juel-1703

Abstract: The release from a sphere doped with fission products into a flowing gas medium is dealt with theoretically, taking into account Fick's diffusion and introducing an a-parameter, which describes the characteristic of the release kinetics at the surface of the sphere. The theoretical statements are compared with experiments, which refer to the system: caesium-matrixgraphite-helium. For the experimental investigations a testing facility especially adjusted to the subject was built. This testing facility is described. Due to our results performed in the temperature range between 900 °C and 1100 °C we can conclude that the desorption of fission products can be described with the proposed model. In this connection the experimentally determined data of the diffusion constant (D), the $\alpha$-parameter ($\alpha$), the evaporation coefficient ($\alpha$ $_{v}$) and the Henry-constant (K) are indicated for the considered system.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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Database coverage:

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